Originally Posted by rosica
I am planning a rear mount turbo (tailpipe turbo/STS) setup, on my 2003 Overland with 4.7H.O.
My main goal is better MPG all around (by increasing VE of the engine with the turbo) and more power (400-500hp) for towing up the little hills out here in the north east.
I need help with the following
-Is there anywhere easy to tap oil pressure?
-Is there anywhere easy for return oil?
-Anyone know a good/cheap oil return/scavenge pump?
-Anyone know injector size on the 4.7 H.O.
For those interested my basic plan is the following
-Install turbo in place of or before muffler (plenty of space)
-GT30R-GT37R (not sure yet, final selection will be what I can find cheap used....)
-No intercooler to start (the long length of Aluminum pipe under the car should be adequate)
-Manual boost controller
-Larger injectors as necessary
-Colder plugs as necessary
Gonna need to at least, swap out the crap factory pistons. The top rings are an 1/8th of an inch from the top of the piston and those ring lands don't fare well under any sort of boost.
Kenne bell was developing a supercharger for the 3.7 and it blew on 5# of boost. Keep in mind, the 3.7 shares a lot with the 4.7 including pistons.
Check out airram.com they will have everything you'll need to build your motor reliably for boost